Aluminum Titanate Pioneering Advanced Thermal Protection Solutions
Aluminum Titanate (Al2TiO5, AT) is an advanced oxide ceramic that features exceptional thermal stability, low thermal expansion and shock-resistance – characteristics which make it suitable for demanding environments like foundries, automotive manufacturing plants and energy sectors.
Sintered AT material displayed FE-SEM micrographs clearly display an intimate distribution and diffusion of alumina grains, enhanced further by the presence of rutile.
High-temperature stability
Aluminium titanate (ATi / Al2TiO5) is an advanced oxide ceramic that combines the advantages of both alumina and titanium dioxide. Manufactured using ultra-pure synthetic raw materials and an advanced reaction sintering process, aluminium titanate is capable of engineering microporous structures for thermal shock resistance, slag resistance, corrosion and alkali resistance properties that make this an excellent addition to any home environment.
Aluminum titanate ceramic solutions are highly suitable for demanding industrial applications that demand components withstanding extreme temperature variations, such as automotive, aerospace, energy and power applications. Aluminum titanate market will continue to expand as technological innovations, global industrial expansion and an emphasis on sustainable precision production increases demand for durable ceramic solutions.
Addition of rutile to sintered aluminium titanate can significantly improve sintering and increase thermal stability by decreasing activation energy for decomposition, while increasing density of the alumina phase and mechanical strength while making casting simpler – leading to precise high-performance ceramic components for conveying or dosing nonferrous metals.
High-temperature resistance
Aluminum titanate ceramics boast lower hysteresis areas than most oxide ceramics, saving energy and maintenance costs while offering reduced coefficient of thermal expansion – ideal for applications requiring high levels of thermal stability.
Silcarb offers an assortment of reaction sintered aluminium titanate products tailored specifically for Foundry applications. Specifically, their material cannot be wetted by liquid aluminium casting crucibles thereby eliminating contamination, thus increasing efficiency of metal casting processes and decreasing reloading rates. Furthermore, this material features excellent chemical resistance as well as superior mechanical properties.
Addition of rutile to alumina significantly increases its sinterability and sintering behavior at higher temperatures, producing highly dense alumina-rutile composites with AT peaks on XRD patterns; this is most likely explained by decreasing activation energy of decomposition as the content increases.
High-temperature strength
As industrialization expands globally and energy efficiency and sustainability become more of a focus, durable materials like aluminum titanate have become highly in-demand. Thanks to its low thermal expansion properties, aluminum titanate ceramic makes for an excellent material in industrial furnaces.
Stanford Advanced Materials’ ATC provides excellent thermal shock resistance, making it suitable for sudden temperature shifts and handling liquid metals in foundry technology and metallurgical melting applications. Furthermore, this material’s corrosion and erosion resistance makes it suitable for lining industrial equipment.
Pure tialite can become unstable at temperatures ranging between 750 and 1280 degC, decomposing upon cooling. However, doping with oxide additives such as magnesium oxide, titanium dioxide, iron oxide, and zirconium oxide to form isostructural phases can stabilize it at higher temperatures – significantly improving performance while simultaneously decreasing thermal expansion while simultaneously increasing density and mechanical strength.
High-temperature durability
As global industrial growth and the move toward more eco-friendly solutions advances, durable aluminum titanate ceramic components have become ever more essential. Boasting low thermal expansion rates, these ceramics enable long-term operation even in extreme temperature environments.
Aluminum titanate is produced through reactive sintering of alumina and titaniumia powders in stoichiometric proportions, creating a polycrystalline ceramic with outstanding chemical resistance, low thermal conductivity, and superior thermal shock resistance. Aluminum titanate finds application in foundry applications such as nozzles, riser tubes, pouring spouts for nonferrous metal casting as well as master moulds; additionally it can be used in processing of molten aluminum.
Rutile can dramatically improve sintering behavior and densification in alumina-rutile composites, leading to significantly decreased thermal expansion values than their pure alumina sintered equivalents at similar temperatures. Pressureless sintered A/AT composites containing different concentrations (0-40wt%) of rutile show an increase in AT peak intensity while keeping their alumina counterparts unchanged.